Chair-back.



5. A Patented Jan. 29, 1918.

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CHAIR-BACK.

Specification of Letters Patent. Patented Jan. 29; 1918.

Application filed-Apri126, 1915, 'Serial No. 23,835.

To all whom z't may concern:

Be it known that I, JERROLD F. WALTON, a citizen of the United States, residing al; Sturgis, in the' county of St. Joseph and State of Michigan, have invented Certain new and useful Improvements in Chair- Backs, of which the following is a specification.

This invention relates to improvements in Chair backs, and particularly to improved means for securing the depending controlling arm for hinged chair backs.

This invention relates to the Structure appearing in Letters Patent No. 1,137,246, issued April 27, 1915, and shows an improved and modified means for securing the arm in position on the back.

The object of mv invention is to provide an improved attaching means for such an adjusting arm. Objccts relating to details and economies of construction and operation will denitely appear from the detailed description to follow.

I accomplish the objects of mv invention by the devices and means described in the following specification. The invention is clearly defined and pointcd out in the claims.

A Structure constituting a preferred embodiment of my invention is clearly illustrated in the accompanving drawing, forming a part of this specification, in which:

Figura I is a detail perspective view of the lower back portion of a chair back with the adjus able detachable arm in position.

Fig. II is an enlarged detail sectional view on a line corresponding to line 2-2 of Fiz. I.

Fig. III is a detail view of a portion of the arm showing the manner of striking up the engaeing lug.

Fig. IV is a detail View of the blank for the bottom clip member showing the formaton of the slot for the bayonet joint.

Fig. V is an enlarged detail View of a modification of the Structure.

In the drawing similar numerals of reference refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Considering the numbered parts of the drawing, the chair back .is made up of side bars 1, 1 and bottom cross bar 2 and cross bars 3. 3 above the same. Secured to the cross bars is a Vertical arm 4 having a straight round shank. tom cross har 2 is a clip 5 by means of screws 6. This clip has a bayonet slot 7 on its under side. I strike up a lug, or'other- Wise form a lug or p'rojection 11 on the side of the arm 4 to coperate with the said bayonet slot when the arm 4 is inserted. I pro- Vide sheet metal clips 12, 12 on the backs of the cross bars 3, 3 Which are secured by suitable screws 13. It Will be seen that the arm 4 is efi'ectively retained in place by this bayonet joint and the clip picces retain the same on the cross bars so that the same is verv efi'ectively sup orted.

This structure atords a cheap and eflective means for securing the har in place. although it is not so well finished or so eft'ective as the Structure of my pa ent referrcd to.

In Fig. V I show a modification of the Structure. A simple clip 5 is provided at the bottom Without the bavonetvslot 7. A clip for the upper end of the bar 14 is secured to an upper cross bar 3 and is provided With an off-set stop 15 for the upper end of the arm 4. The lug 11 is of such form that it can be passed up in the angle between the clip piece 5 and the bottom cross bar 2 and then turned toward the back part of the chair to engage above the top of clip 5, as clearly appears in Fig. V.

I desire to state that this Structure can be considerably modified without departing from my invention, as pointed out in the appended claims.

Having thus described my invention, what I cla m as new and desire to secure by Let- 55 Secured to the botv ing it to the said. back 5 a lug on said. arm 'for engagmg one of sald chps; stop means for hmltmg the upward movement of sa1c1 arm, as specified.

3 In a Chair, the combination of a hnged back comprisng side and cross bare, a. detachable arm n said. back With a 'found straight shank, Clips mounted on said cross hars and. embracng said. arm retaining' the same in poston, and, means 011 said arm coacting With one of said clps to support the arm longitudinally.

In witness Whereof, I have hereunto set my 'hand and seal in the presence of two Wtnesses.

JERROLD F. VALTON.

Witnesses:

' F. T. SMITH,

ALVENA K. SCHAFER.

Gomes oi? this patea@ may 'be obfcained for five cents'e'ach, by adressngthe "Caissioner oi? ?Nama Washington, D. G. 

